Subjects will complete the DASH and TOSSA questionnaires (the total amount of time required to complete these assessment is ~20 minutes), and will be tested using the modified Clinical Testing of Sensory Integration in Balance (mCTSIB) protocol (the subjects will be required to stand on a hard or compliant surface (a 4" tall foam cushion of known mechanical properties) in a comfortable posture, feet shoulder width, with eyes open or closed, head straight and arms to the side and free to move, gazing forward, and breathing normally, less than 2 minutes testing time) at the time of enrollment and at the end of the 4 week therapy program.